The Country Fire Service is fighting 17 fires at locations on Eyre Peninsula, Kangaroo Island and Fleurieu Peninsula.

Justin Woolford from the CFS Region Six said the fires are all being actively monitored, and are not currently posing risks to people or property.

He said an afternoon change in weather conditions assisted the fight against fires on the Eyre Peninsula.

"With the wind change coming around to the South West that's certainly eased off conditions, its nowhere near as warm or the winds as strong as what it has been today.

"However the lightning we're currently experiencing through the thunderstorm band is not accompanied by a lot of rain, as some of the other areas of the state has received, so we're still battling fairly well."

Mr Woolford said while fire fighters have worked hard to protect properties in the area, there have been some losses.

A grass and scrub fire at Darke Peak on Upper Eyre Peninsula has swept through about 300 hectares, causing damage to a tractor, shed, water tanks, and crops, with damage estimated at $138,000.

Mr Woolford said the threat of this fire has reduced, and it continues to be monitored within containment lines.

Fire fighters also continue to control another fire near Bramfield, burning north of the Birdseye Highway in the Elliston region.

"That's burning in some swampy marshland area, which is quite inaccessible to crews, but we've had crews on the ground since 5:30 this morning assisting with that one," Mr Woolford said.

Several fire trucks and farm fire-fighting units are reportedly on hand trying to contain the blaze, along with front end loaders creating earth breaks.

Another fire continues to burn in the Nunnyah Conservation Reserve, about 15 kilometres north of Nunjikompita on the Eyre Highway, between Smoky Bay and Wirrulla on the west coast of Eyre Peninsula.

On Kangaroo Island, a bushfire advice message has been issued for Gosse, near Berryman Road and North Coast Road.

While the fires are not posing a threat to local residents or properties, the CFS says people should still be aware of the fire and continue monitoring conditions.

Listen to ABC Eyre Peninsula Radio on 1485AM or find your local frequency on a battery-powered radio for updates.